84 lines
3.1 KiB
Python
84 lines
3.1 KiB
Python
"""
|
|
DE-specific Form helpers
|
|
"""
|
|
|
|
from django.newforms import ValidationError
|
|
from django.newforms.fields import Field, RegexField, Select, EMPTY_VALUES
|
|
from django.utils.translation import ugettext_lazy as _
|
|
import re
|
|
|
|
id_re = re.compile(r"^(?P<residence>\d{10})(?P<origin>\w{1,3})[-\ ]?(?P<birthday>\d{7})[-\ ]?(?P<validity>\d{7})[-\ ]?(?P<checksum>\d{1})$")
|
|
|
|
class DEZipCodeField(RegexField):
|
|
default_error_messages = {
|
|
'invalid': _('Enter a zip code in the format XXXXX.'),
|
|
}
|
|
def __init__(self, *args, **kwargs):
|
|
super(DEZipCodeField, self).__init__(r'^\d{5}$',
|
|
max_length=None, min_length=None, *args, **kwargs)
|
|
|
|
class DEStateSelect(Select):
|
|
"""
|
|
A Select widget that uses a list of DE states as its choices.
|
|
"""
|
|
def __init__(self, attrs=None):
|
|
from de_states import STATE_CHOICES
|
|
super(DEStateSelect, self).__init__(attrs, choices=STATE_CHOICES)
|
|
|
|
class DEIdentityCardNumberField(Field):
|
|
"""
|
|
A German identity card number.
|
|
|
|
Checks the following rules to determine whether the number is valid:
|
|
|
|
* Conforms to the XXXXXXXXXXX-XXXXXXX-XXXXXXX-X format.
|
|
* No group consists entirely of zeroes.
|
|
* Included checksums match calculated checksums
|
|
|
|
Algorithm is documented at http://de.wikipedia.org/wiki/Personalausweis
|
|
"""
|
|
default_error_messages = {
|
|
'invalid': _('Enter a valid German identity card number in XXXXXXXXXXX-XXXXXXX-XXXXXXX-X format.'),
|
|
}
|
|
|
|
def has_valid_checksum(self, number):
|
|
given_number, given_checksum = number[:-1], number[-1]
|
|
calculated_checksum = 0
|
|
fragment = ""
|
|
parameter = 7
|
|
|
|
for i in range(len(given_number)):
|
|
fragment = str(int(given_number[i]) * parameter)
|
|
if fragment.isalnum():
|
|
calculated_checksum += int(fragment[-1])
|
|
if parameter == 1:
|
|
parameter = 7
|
|
elif parameter == 3:
|
|
parameter = 1
|
|
elif parameter ==7:
|
|
parameter = 3
|
|
|
|
return str(calculated_checksum)[-1] == given_checksum
|
|
|
|
def clean(self, value):
|
|
super(DEIdentityCardNumberField, self).clean(value)
|
|
if value in EMPTY_VALUES:
|
|
return u''
|
|
match = re.match(id_re, value)
|
|
if not match:
|
|
raise ValidationError(self.error_messages['invalid'])
|
|
|
|
gd = match.groupdict()
|
|
residence, origin = gd['residence'], gd['origin']
|
|
birthday, validity, checksum = gd['birthday'], gd['validity'], gd['checksum']
|
|
|
|
if residence == '0000000000' or birthday == '0000000' or validity == '0000000':
|
|
raise ValidationError(self.error_messages['invalid'])
|
|
|
|
all_digits = u"%s%s%s%s" % (residence, birthday, validity, checksum)
|
|
if not self.has_valid_checksum(residence) or not self.has_valid_checksum(birthday) or \
|
|
not self.has_valid_checksum(validity) or not self.has_valid_checksum(all_digits):
|
|
raise ValidationError(self.error_messages['invalid'])
|
|
|
|
return u'%s%s-%s-%s-%s' % (residence, origin, birthday, validity, checksum)
|